Door-controlling device



H'. W. CRANE. DOOR' CONTROLLIG DEVICE.4 Armcmou man ocr. l, m.

Patented lJuly 18, 1922.

.2SHEEYS-SHIET l.

H.AW. CRANE.

DOOR CONTROLLING DEVICE.

APPIICATION FILED OCT. h 1919 Patented July 18, 1922.

2 SHEETS-SHEET 2'.

UNITED STATES HERBERT W. CRANE, OF CHICAGO, ILLINOIS.

DOOR-CONTROLLING DEVICE.

Specification of Letters Patent.

Patented July 18, 1922.

Application led October 1, 1919. Serial No. 327,785.

T0 all fwwm t may concern:

Be it known that I, I-Innnnn'r W. CRANE, a citizen of the United States,and resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Door-ControllingDevices, of which the following is a specification.

My invention relates to means for controlling the operations of doors orsimilar closures and particularly to an improvement on the constructionshown in my Patent No. 1,290,718 of Jan. 7th, 1919, and in my copendingapplication, Serial No. 295,568, filed May 8th, 1919.

The improvement herein ydescribed and shown has for its object theprovision of means whereby the actuation kof the mechanism is made morepositive and in which any element of uncertainty is removed. To that endI have provided means in connection with a spring-actuated pole changerand switch for mechanicallyr actuating said switch and simultaneously,by the use of a second switch, shutting off the supply of current to themotor. The mechanism shown in my application referred to has beenconsiderably simplified and the operation thereof rendered more certainand sure.

The invention will be more readily understood by reference to theaccompanying drawings, wherein, i i

Fig. 1 is a side elevation of a controlling device constructed inaccordance with my invention, the motor being omitted;

Fig. 2 is an end view partly in section showing the deviceformechanically actuating certain movable parts; i

Fig. 3 is a sectional view on the line 3-3 of Fig. 1, and, n

Fig. 4 is a wiring'diagram. v

In the drawings it. will be seen that I provide a base plate 10, towhich the motor (not shown) is adapted to'be secured, and from whichdepend certain frame members 11, 12, 13, 14, which provide bearings forthe different transverse shafts. It will be understood that theoperating motor is mechanically connected to the door to be operated andtherefore that the door is mechanically connected to the switchvoperating mechanism, later to be described. A shaft 15, is mounted insuitable bearings n the depending members 12, 14, 'and has securedthereto a gear 16, adapted to be connected to the motor through a pinion16L and shaft 16b and to rotate in opposite directions in unisontherewith. This shaft is threaded at `an intermediate point and a nut17, is mounted on the threaded portion between adjustable abutments18,19, mounted in a sleeve 20, loosely mounted on the shaft 15. Thesleeve 20, has a disk 21, secured thereto, the disk being provided witha notch 22, in its periphery, best'shown in Fig.- 2. The arrangement issuchthat as the shaft 15, is rotated it, causes the travel of the nut17, between the abutments. When the nut reaches a predetermined pointitis caused to jam against one of the abutments 18, 19, which serves toeflect the rotation of the sleeve 20, with the shaft, thus changing theangular position of the notch 22, in the disk 21. Normally a roller 23,is seated inthe notch 22, the roller being carried by an arm 24, fixedto a shaft 25, extending longitudinally of the device, as shown inFig. 1. When the disk is rotated the roller is displaced, thus causingoscillation of the arm 24. The shaft 25, best shown in Fig. 3, carries arocker having short and long arms 26, 27,1respectively, which bearagainst a relatively flexible arm 28. This arm is secured to a rigid arm29, thus forming a bell .crank adapted to oscillate on a pin 30, as acenter. At the outer end of the arm 29, is mounted a trip member 3,1,held in position by a tension spring 32, the trip member having a notch33, adapted to engage with a pin 34, carried by a pawl 35. The pawlengages a ratchet wheel 36, mounted on a shaft 37, which carries a polechanger 38, shown in Fig. 1 and indicated diagrammatically in Fig. 4.This multiple switch or pole changer is adapted for step-by-steprotation in one direction, as permitted by the mechanism described. Thepawl 35, is in effect a bell crank, the other arm 39, of which overliesa side opposite to that which is engaged by the pawl. 35, and preventsthe pawl from advancing more than a step at a single actuation. The faceof the ratchet 36, is provided with two arcuate deflectors 40, 41,adapted to engage the depending trip member 31, and in certain positionsprevent the engagement of the notch 33, in the trip memberwith the pin34. In other Words, the parts are so arranged that actua-A tion ot thetrip member will serve to cause advancement oir the pole changer through900 when the ratchet attached to the pole changer is in two positionsand to prevent such actuation when the ratchet is in two otherpositions. Vilhile in the position shown in the drawing the lifting ofthe trip member 3l would have no etl'ect on the arm as the notch 33cannot engage with the pin 3e. lVhen, however, the ratchet has advancedone notch the arcuate projection a0 will be out et the way and themember may swing into a vertical position. The arm 2S, is constructed offlexible material iirorder to avoid the possibility olf breakage due toany disar rangement of the parts which would prevent normal actuation.The arm 2T, is longer than the arm 26, because of its greater distance'from the center of oscillation of the bell crank. Tt will be understoodthat the shaft 25, and therefore the rocker having the arms 25, 27, willoscillate in opposite directions due to the opposite rotation of' themotor and the consequent opposite oscillation ot the arm 24e, whichcarries the roller The pole changer or multiple switch 88 is rotated bya coil spring 55, as described in my application heretofore referred to,the spring being Wound when the motor is rotating in one direction andbeing unaffected during opposite rotation olf the motor. This result issecured by means olf the pawl and ratchet 4t2, 43, and the pawl andratchet Liet, 4.5, best shown in Fig. 2. A solenoid 4:6, is suitablvsecured to the frame, its core lil, being provided with an oscillatingtongue e8, having a notch 49, adapted to lie beneath the pin 34:, on thepawl 35. Upon actuation of the solenoid core it will be seen that thepawl is liited and the pole changer is rotated.

Also mounted on the shaft 25, is a rocker 50, the two arms of which areadapted to con tact and actuate plungers 5l, 52, forming a part of twosnap switches 53, 54. The switches are so arranged that in the positionshown in Fig. 2, both are in a circuit-closed position. Tt will be seenthat upon the arrival of a door to which the motor is connected to itslimit of movement, which limit is lixed by the adjustment of the nuts1S, 19, on the shait 15, the rocker 50, will be moved in one directionor the other due to the oscillation oi the arm 24 and one or the otherot' the switches 53, 54C, will be opened. By this means I provide for apositive mechanical shut-ott of the current to the inotor irrespectiveof the action of the multiple switch 38. This is to avoid thepossibility of any misoperation due to the unwinding or breaking of themultiple switch spring` Referring now to the diagram shown in Fig. 4v,`the parts are shown in a position such as they will occupy at a limitof movementof the device to beoperated. In that position the polechanger will be in a neutral position and one ot the switches 53, 54,will be in an open position the other beingl closed. For conveniencethis is shown dill'erently from the position indicated in Fig. 2, inwhich both oit the switches 53, 5a, are closed. Tn that View the motorhas been stopped with the door in an intermediate position.

Assuming the parts in the position ol Fig. at, upon actuation olf one otthe circuit closures 56, the solenoid 46, is energized, which eiiectsthe rotation of the pole changer through 90o in a direction indicated bythe arrow. This places contact pieces 57, in engagement with contacts58, 59, whereby our rent received through the line 60, the switch 5a,and line (3l, is delivered to the line (i2. Freni there it is deliveredto contact 5211, thence through contact piece oei, which is crossconnected by the hand 65, to contact 66. A. line 67, carries the currentto the brushes oi' the motor 68, and a. line 69, returns the current tocontact 70, thence through contact piece 7l, to contact 72. lt thentravels through line T3. to the Vfields of the motor, thence by lineTel, to a ground.

The motor is then in operation and immediately upon the starting of themotor in a reverse direction from that at which it was stopped, the arm24k, will return to the position shown in Fig. 2, whereupon both ot theswitches 53, 54E, will be closed. Rotation will continue it'uninterrupted until the door reaches its opposite limit ot movement,whereupon the arm 2li, will be oscillated in a reverse direction, due tothe rotation of the sleeve 20, and the displacement of the roller 'fromthe notch 22, thus serving to oscillatc the rocker 26, 2T, and thetripping of the pole changer, whereby the current is shut ott from themotor. Simultaneously, one of the switches 53, 54, through which currentis being supplied to the motor, is opened. Thus there is a doubleshut-olf of the power to the motor. Of course, if the motor isinterrupted in its travel toward an extreme position of the door both.the switches 58, 54, will remain in closed position. The stoppage oi themotor at any point may be effected by actuating the solenoid and causing'the rotation of the multiple switch.

One oi the important features of my invention .is that of providing aspring-actuated multiple switch together with automatic means forpermitting the actuation thereof as required, said mechanism being,rassociated with means for positively andniechanically disconnecting thesource ol power from the motor at an extreme point in the movement ofthe closure which is being ac tuated. This avoids all possibility ofinjury to the parts due to the burningT out et the motor.

Obviously modiiications may be made in they structure shown and suchmodifications as will suggest themselves to those skilled in the art areconsidered to be Within the scope of my invention.

I claim:

1. In door operatin means, the combination of a switch mem er adapted tobe rotated by a stepby-step movement in one direction, and to shut off asupply of current to a motor, a spring for effecting rotation of saidswitch member, a motor, and mechanical means operated by the motor at ade. sired limit of movement for effecting power shutso simultaneouslywith the interruption of power by said switch member, substantially asdescribed.

2. In a door controlling device, the combination of a motor, aspring-rotated pole changer adapted to interrupt the supply of currentto the motor at adesired limit of movement, and mechanical meansoperated by the motor for positively shutting olf the supply of currentto the motor simultaneously with the operation of said pole changer,substantially as described.

3. In door controlling means, the combination with a motor of a multipleswitch,

' means including a spring for imparting a step-by-step rotation to saidmultiple switch, an electric circuit and a solenoid therein foractuating said switch, means operable by the motor at a desired limit ofmovement for actuating said switch to shut off the supply of current tothe motor, and additional means also operated by the motor forpositively shutting olf the supply of current to the motorsimultaneously with the actuation of said multiple switch, substantiallyas described.

4. In door controlling means, the combi nation with a reversing motor,of a combined multiple switch and pole changer, electrical means foreffecting the actuation of said multiple switch and pole changer,mechanical means for automatically actuating said multiple switch andpole changer at predetermined limits of movement of the device actuatedby the motor, a second switch for interrupting the supply of curd rentto the motor, and mechanical means for positively actuating said secondswitchupon arrival of the device to be operated at a predetermined limitof movement, substantially as described.

5. In a door operating device, the combination with a motor, of acylindrical pole changer, spring means for rotating said pole changer bya step-by-step movement, a low voltage solenoid for tripping and permitting the advancement of said pole changer, mechanical means forautomatically tripping said pole changer, and additional mechanicallyoperated means for interrupting the supply of current to the motorindependently of the operation of said pole changer, substantially asdescribed.

6. In door controlling mechanism, the combination withk a motor, of amultiple switch, a low voltage solenoid, means operable by the actuationof said solenoid Jfor operating said multiple switch, mechanical meansoperable by the motor for actuating said multiple switch, a secondswitch for controlling the passage of current to the motor, andmechanical means operated by the motor for actuating said second switchwhereby a double break in the current-supplying line is effected uponarrival of the motor operated device at a ypredetermined point,substantially as described.

Signed at Chicago, Illinois, this 27th day of September, 1919.

HERBERT W. CRANE.

Witness:

T. D. BUTLER.

